package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class ReportServiceImpl implements ReportService {

    @Autowired
    OrderMapper  orderMapper;
    @Autowired
    UserMapper userMapper;
    @Autowired
    WorkspaceService workspaceService;

    @Override
    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList=new ArrayList<>();
        dateList.add(begin);
        while(!begin.equals(end))
        {
            begin=begin.plusDays(1);
            dateList.add(begin);
        }
        List<Double> turnoverList=new ArrayList<>();
        for(LocalDate date:dateList)
        {
            LocalDateTime beginTime=LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime=LocalDateTime.of(date, LocalTime.MAX);
            Map map=new HashMap();
            map.put("begin",beginTime);
            map.put("end",endTime);
            map.put("status",5);
            Double turnover=orderMapper.sumByMap(map);
            if(turnover==null)
            {
                turnover=0.0;
            }
            turnoverList.add(turnover);
        }
        return TurnoverReportVO
                .builder()
                .dateList( StringUtils.join(dateList,","))
                .turnoverList(StringUtils.join(turnoverList,","))
                .build();
    }

    @Override
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList=new ArrayList<>();
        dateList.add(begin);
        while(!begin.equals(end))
        {
            begin=begin.plusDays(1);
            dateList.add(begin);
        }
        //存放每天新增用户数量
        List<Integer> newUserList=new ArrayList<>();
        //存放每天总用户数量
        List<Integer> totalUserList=new ArrayList<>();
        for(LocalDate date:dateList)
        {
            LocalDateTime beginTime=LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime=LocalDateTime.of(date, LocalTime.MAX);
            Map map=new HashMap();
            map.put("end",endTime);
            Integer totalUser=userMapper.countByMap(map);
            map.put("begin",beginTime);
            Integer newUser=userMapper.countByMap(map);
            totalUserList.add(totalUser);
            newUserList.add(newUser);
        }
        return UserReportVO.builder()
                .dateList(StringUtils.join(dateList,","))
                .newUserList(StringUtils.join(newUserList,","))
                .totalUserList(StringUtils.join(totalUserList,","))
                .build();
    }

    @Override
    public OrderReportVO getOrderStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList=new ArrayList<>();
        dateList.add(begin);
        while(!begin.equals(end))
        {
            begin=begin.plusDays(1);
            dateList.add(begin);
        }
        List<Integer> orderCountList=new ArrayList<>();
        List<Integer> validOrderCountList=new ArrayList<>();
        for(LocalDate date:dateList)
        {
            LocalDateTime beginTime=LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime=LocalDateTime.of(date, LocalTime.MAX);
            Integer orderCount=getOrderCount(beginTime,endTime,null);
            Integer validOrderCount=getOrderCount(beginTime,endTime, Orders.COMPLETED);
            orderCountList.add(orderCount);
            validOrderCountList.add(validOrderCount);
        }
        Integer totalOrderCount=orderCountList.stream().reduce(Integer::sum).get();
        Integer validOrderCount=validOrderCountList.stream().reduce(Integer::sum).get();
        Double orderCompletionRate=0.0;
        if(totalOrderCount>0)
        {
            orderCompletionRate=validOrderCount.doubleValue()/totalOrderCount;
        }
        return OrderReportVO.builder()
                .dateList(StringUtils.join(dateList,","))
                .orderCountList(StringUtils.join(orderCountList,","))
                .validOrderCountList(StringUtils.join(validOrderCountList,","))
                .orderCompletionRate(orderCompletionRate)
                .totalOrderCount(totalOrderCount)
                .validOrderCount(validOrderCount)
                .build();
    }
    private Integer getOrderCount(LocalDateTime begin, LocalDateTime end,Integer status)
    {
        Map map=new HashMap();
        map.put("begin",begin);
        map.put("end",end);
        map.put("status",status);
        return userMapper.countByMap(map);
    }

    @Override
    public SalesTop10ReportVO getSalesTop10(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime=LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime=LocalDateTime.of(begin, LocalTime.MAX);
        List<GoodsSalesDTO> salesTop10=orderMapper.getSalesTop10(beginTime,endTime);
        List<String> names=salesTop10.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        String nameList=StringUtils.join(names,",");
        List<String> numbers=salesTop10.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        String numberList=StringUtils.join(numbers,",");
        return SalesTop10ReportVO
                .builder()
                .numberList(nameList)
                .numberList(numberList)
                .build();

    }

    @Override
    public void exportBusinessData(HttpServletResponse response) {
        //查询数据库，获取营业数据
        LocalDate  begin=LocalDate.now().minusDays(30);
        LocalDate  end=LocalDate.now().minusDays(1);
        LocalDateTime beginTime=LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime=LocalDateTime.of(end, LocalTime.MAX);
        BusinessDataVO businessDataVO=workspaceService.getBusinessData(beginTime,endTime);

        //通过POI写入到excel文件
        InputStream in=this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");
        //基于模板文件创建新的excel文件

        try {
            XSSFWorkbook excel=new XSSFWorkbook(in);
            //填充数据--时间
            XSSFSheet sheet = excel.getSheet("sheet1");
            sheet.getRow(1).getCell(1).setCellValue("时间："+beginTime.toString()+"至"+endTime.toString());
            XSSFRow row=sheet.getRow(3);
            row.getCell(2).setCellValue(businessDataVO.getTurnover());
            row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
            row.getCell(6).setCellValue(businessDataVO.getNewUsers());
            row=sheet.getRow(4);
            row.getCell(2).setCellValue(businessDataVO.getValidOrderCount());
            row.getCell(4).setCellValue(businessDataVO.getUnitPrice());
            //填充明细数据
            for(int i=0;i<30;i++)
            {
                LocalDate date=begin.plusDays(i);
                BusinessDataVO businessData=workspaceService.getBusinessData(LocalDateTime.of(date,LocalTime.MIN),LocalDateTime.of(date,LocalTime.MAX));
                row=sheet.getRow(7+i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessDataVO.getTurnover());
                row.getCell(3).setCellValue(businessDataVO.getValidOrderCount());
                row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessDataVO.getUnitPrice());
                row.getCell(6).setCellValue(businessDataVO.getNewUsers());
            }
            //通过输出流将excel文件下载到客户端浏览器
            ServletOutputStream out = response.getOutputStream();
            excel.write(out);
            out.close();
            in.close();
            excel.close();
        } catch (IOException e) {
            throw new RuntimeException(e);
        }


    }
}






















